The Siemens SENTRON 3VA1080-4ED36-0CC0 is a 3-pole molded case circuit breaker (MCCB) rated for 80 A at 40 °C, with a breaking capacity of 121 kA at 240 V AC. The line-protection design suits it for feeder circuits where you need selective coordination downstream of a main breaker. Insulation voltage is rated at 800 V. Power loss maxes at 21.7 W.
This breaker's interrupting rating drops as voltage climbs: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V (–). For a 480 V panel, you've got 52.5 kA of fault-clearing headroom — enough for most industrial services.
Thermal derating — what it means on a hot panel
At 55 °C it derates to 78 A, at 60 °C to 77 A, at 65 °C to 75 A, and at 70 °C to 74 A (–).
Built-in undervoltage release and auxiliary switches
It also carries two auxiliary switches (HQ design) for remote status indication.